Angular tuning of defect modes spectrum in the one-dimensional photonic crystal with liquid-crystal layer |
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| Authors: | V G Arkhipkin V A Gunyakov S A Myslivets V Ya Zyryanov V F Shabanov |
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| Institution: | (1) L.V. Kirensky Institute of Physics, Krasnoyarsk Scientific Centre, SB RAS, 660036 Krasnoyarsk, Russia;(2) Siberian Federal University, 660041 Krasnoyarsk, Russia |
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| Abstract: | A one-dimensional ZrO2/SiO2 photonic crystal with a 4-n -pentyl-4' -cyanobiphenyl (5CB) nematic defect layer was used to investigate the transmission spectra of light polarized
parallel and perpendicular to the liquid-crystal director at different angles of incidence. The spectra of the photonic crystal
were shown to split into four polarized components Tij at oblique incidence. When the incident angle increased, the bandgap edges and the defect modes shifted towards short wavelengths,
while the amplitudes of the defect modes increased for the transverse magnetic polarization and decreased for the transverse
electric polarization. The observed discrepancy between the defect mode amplitudes in the center and near the edges of the
photonic bandgap was found to be related to the radiation losses inside the defect layer of a non-ideal photonic crystal.
The simulated transmission spectra obtained using recurrence relations and taking into account the decay of defect modes are
in good agreement with the experimental data. |
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| Keywords: | 42 70 Qs Photonic bandgap materials 42 70 Df Liquid crystals 42 25 Bs Wave propagation transmission and absorption 78 20 Ci Optical constants (including refractive index complex dielectric constant absorption reflection and transmission coefficients emissivity) |
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